package com.sgm.carlinkclass.widget;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.support.annotation.Nullable;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.ForegroundColorSpan;
import android.util.AttributeSet;
import android.widget.TextView;
import com.sgm.carlinkclass.R;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@SuppressLint("AppCompatCustomView")
public class SignKeyWordTextViewextends TextView {
//关键字
private StringsignText;
//关键字颜色
private int signTextColor;
private int changeIndex =0;
public SignKeyWordTextView(Context context) {
super(context);
}
public SignKeyWordTextView(Context context,@Nullable AttributeSet attrs) {
super(context, attrs);
initializeAttrs(attrs);
}
public SignKeyWordTextView(Context context,@Nullable AttributeSet attrs,int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public void setText(CharSequence text, BufferType type) {
changeIndex =0;
super.setText(matcherSignText(text.toString()), type);
}
//初始化自定义属性
private void initializeAttrs(AttributeSet attrs) {
TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.SignKeyWordTextView);
//获取关键字
signText = typedArray.getString(R.styleable.SignKeyWordTextView_signText);
//获取关键字颜色
signTextColor = typedArray.getColor(R.styleable.SignKeyWordTextView_signTextColor, getTextColors().getDefaultColor());
typedArray.recycle();
}
public void setSignText(String signText) {
this.signText = signText;
setText(getText());
}
public void setSignTextColor(int signTextColor) {
this.signTextColor = signTextColor;
setText(getText());
}
// 高亮显示
public SpannableStringBuilder matcherSignText(CharSequence mOriginalText) {
changeIndex++;
int change =0;
if (TextUtils.isEmpty(mOriginalText)) {
return new SpannableStringBuilder("");
}
if (TextUtils.isEmpty(signText)) {
return new SpannableStringBuilder(mOriginalText);
}
//关键代码
SpannableStringBuilder builder =new SpannableStringBuilder(mOriginalText);
ForegroundColorSpan foregroundColorSpan =new ForegroundColorSpan(signTextColor);
Pattern p = Pattern.compile(signText);
Matcher m = p.matcher(mOriginalText);
while (m.find()) {
change++;
int start = m.start();
int end = m.end();
if (changeIndex == change) {
builder.setSpan(foregroundColorSpan, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return matcherSignText(builder);
}
}
return builder;
}
}
